Standard Deviation
Definition of " Standard Deviation Formula of standard deviation How to find standard deviation in Excel ? Standard Deviation : It is Average Deviation of process output from their average Standard deviation is denoted by σ, s, sigma Standard deviation formula ** formula to find standard deviation in google doc and MS Excel ( if process output data are in cell B4 to b13 of excell sheet ) =stdev(B4:B13) Example: we have below process output, find standard deviation 0.12, 0.14, 0.16, 0.18, 0.20 Solution Xi Xi - x̄ ( Xi - x̄)2 0.12 -0.04 0.0016 0.14 -0.02 0.0004 0.16 0.00 0 0.18 0.02 0.0004 0.20 0.04 0.0016 X̄ = 0.16 = 0.004 = 0.004 Let us understand standard deviation formula by easy